Occludin Recombinant Rabbit Monoclonal Antibody [JJ091-08]
Specification
Catalog# ET1701-76
Occludin Recombinant Rabbit Monoclonal Antibody [JJ091-08]
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WB
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IP
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FC
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IF-Cell
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IHC-P
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IHC-Fr
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IF-Tissue
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Human
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Mouse
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Rat
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Cynomolgus monkey
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Pig
Overview
Product Name
Occludin Recombinant Rabbit Monoclonal Antibody [JJ091-08]
Antibody Type
Recombinant Rabbit monoclonal Antibody
Immunogen
Synthetic peptide within N-terminal human Occludin.
Species Reactivity
Human, Mouse, Rat (Predicted: Cynomolgus monkey, Pig)
Validated Applications
WB, IP, FC, IF-Cell, IHC-P, IHC-Fr, IF-Tissue
Molecular Weight
Predicted band size: 59 kDa
Positive Control
Human colon tissue, mouse colon tissue, rat colon tissue, Caco-2, MCF-7 cell lysate, Mouse smooth muscle tissue lysate.
Conjugation
unconjugated
Clone Number
JJ091-08
RRID
Product Features
Form
Liquid
Storage Instructions
Shipped at 4℃. Store at +4℃ short term (1-2 weeks). It is recommended to aliquot into single-use upon delivery. Store at -20℃ long term.
Storage Buffer
1*TBS (pH7.4), 0.05% BSA, 40% Glycerol. Preservative: 0.05% Sodium Azide.
Isotype
IgG
Purification Method
Protein A affinity purified.
Application Dilution
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WB
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1:1,000-1:2,000
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FC
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1:1,000
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IP
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Use at an assay dependent concentration.
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IF-Cell
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1:500
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IHC-P
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1:100-1:500
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IHC-Fr
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1:500
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IF-Tissue
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1:500
Applications in Publications
Species in Publications
Target
Function
Occludin is an integral membrane protein closely associated with the tight junctions of epithelial and endothelial cells. Occludin is a tetraspan integral membrane protein in epithelial and endothelial tight junction (TJ) structures that can contain two extracellular loops. The protein exists in a variety of phosphorylated forms. Phosphorylation is involved in regulating both the localization and the function of occludin. Expression of occludin is up-regulated by poly-unsaturated fatty acids, increasing transendothelial cell resistance and reducing cellular permeability to large molecules. The level of occludin varies greatly depending on tissue; in brain tissue, occludin is highly expressed at cell-cell contact sites. Non-neural tissues show lower expression and discontinuous distribution. Up-regulation of epithelial occludin may play a role in enhancing paracellular permeability and be related to the damage to the tight junction.
Background References
1. Cao S et al. Hydrogen sulfide attenuates brain edema in early brain injury after subarachnoid hemorrhage in rats: Possible involvement of MMP-9 induced blood-brain barrier disruption and AQP4 expression. Neurosci Lett 621:88-97 (2016).
2. Zhang C et al. Catalpol downregulates vascular endothelial-cadherin expression and induces vascular hyperpermeability. Mol Med Rep 13:373-8 (2016).
Sequence Similarity
Belongs to the ELL/occludin family.
Tissue Specificity
Localized at tight junctions of both epithelial and endothelial cells. Highly expressed in kidney. Not detected in testis.
Post-translational Modification
Dephosphorylated by PTPRJ. The tyrosine phosphorylation on Tyr-398 and Tyr-402 reduces its ability to interact with TJP1. Phosphorylation at Ser-490 also attenuates the interaction with TJP1.
Subcellular Location
Cell membrane, tight junction.
Synonyms
BLCPMG antibody
FLJ08163 antibody
FLJ18079 antibody
FLJ77961 antibody
FLJ94056 antibody
MGC34277 antibody
Occludin antibody
Ocln antibody
OCLN_HUMAN antibody
Tight junction protein occludin antibody
Images
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☑ Knockdown (KD)
Western blot analysis of Occludin on different lysates with Rabbit anti-Occludin antibody (ET1701-76) at 1/2,000 dilution.
Lane 1: HAP1-parental cell lysate
Lane 2: HAP1-Occludin KD cell lysate
Lysates/proteins at 10 µg/Lane.
Predicted band size: 59 kDa
Observed band size: 59 kDa
Exposure time: 180 seconds; ECL: K1801;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (ET1701-76) at 1/2,000 dilution was used in K1803 at 4℃ overnight. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1/50,000 dilution was used for 1 hour at room temperature. -
Application: IHC-Fr
Species: Mouse
Site: Colon
Sample: Frozen section
Antibody concentration: 1:500
Antigen retrieval: Not required -
Immunohistochemical analysis of paraffin-embedded human colon tissue with Rabbit anti-Occludin antibody (ET1701-76) at 1/100 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1701-76) at 1/100 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX. -
Immunohistochemical analysis of paraffin-embedded mouse colon tissue with Rabbit anti-Occludin antibody (ET1701-76) at 1/500 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1701-76) at 1/500 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX. -
Immunohistochemical analysis of paraffin-embedded rat colon tissue with Rabbit anti-Occludin antibody (ET1701-76) at 1/100 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1701-76) at 1/100 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX. -
Immunocytochemistry analysis of Caco-2 cells labeling Occludin with Rabbit anti-Occludin antibody (ET1701-76) at 1/500 dilution.
Cells were fixed in 4% paraformaldehyde for 20 minutes at room temperature, permeabilized with 0.1% Triton X-100 in PBS for 5 minutes at room temperature, then blocked with 1% BSA in 10% negative goat serum for 1 hour at room temperature. Cells were then incubated with Rabbit anti-Occludin antibody (ET1701-76) at 1/500 dilution in 1% BSA in PBST overnight at 4 ℃. Goat Anti-Rabbit IgG H&L (iFluor™ 488, HA1121) was used as the secondary antibody at 1/1,000 dilution. PBS instead of the primary antibody was used as the secondary antibody only control. Nuclear DNA was labelled in blue with DAPI.
Beta tubulin (M1305-2, red) was stained at 1/100 dilution overnight at +4℃. Goat Anti-Mouse IgG H&L (iFluor™ 594, HA1126) was used as the secondary antibody at 1/1,000 dilution. -
Flow cytometric analysis of Caco-2 cells labeling Occludin.
Cells were fixed and permeabilized. Then stained with the primary antibody (ET1701-76, 1μg/mL) (red) compared with Rabbit IgG Isotype Control (green). After incubation of the primary antibody at +4℃ for an hour, the cells were stained with a iFluor™ 488 conjugate-Goat anti-Rabbit IgG Secondary antibody (HA1121) at 1/1,000 dilution for 30 minutes at +4℃. Unlabelled sample was used as a control (cells without incubation with primary antibody; black). -
Western blot analysis of Occludin on different lysates with Rabbit anti-Occludin antibody (ET1701-76) at 1/1,000 dilution.
Lane 1: MCF-7 cell lysate (10 µg/Lane)
Lane 2: Mouse smooth muscle tissue lysate (20 µg/Lane)
Predicted band size: 59 kDa
Observed band size: 59 kDa
Exposure time: 2 minutes;
12% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (ET1701-76) at 1/1,000 dilution was used in 5% NFDM/TBST at room temperature for 2 hours. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1:300,000 dilution was used for 1 hour at room temperature. -
Application: IF-Tissue
Species: Mouse
Site: colon
Sample: Paraffin-embedded section
Antibody concentration: 1/500
Please note: All products are "FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE"
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